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  <title>Document</title>
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    div {
      /* 边框盒子模型 */
      box-sizing: border-box;
      width: 500px;
      height: 200px;
      background-color: rgb(113, 196, 53);
      padding: 50px;
      border: 10px solid rgb(73, 73, 146);
    }
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<body>
  <div>
    内容1
  </div>
  <div>
    内容2
  </div>

</body>

</html>